Yes, people with lazy eyes could wear the eye patch to release the symptom. Usually they should wear not than 8 hours a day. Or else, their eyes will get tired. They will feel weak at the vision after a long time wearing. Thus they should limit the time of wearing of eye patch.
Ok, as you can see, lazy eyes is one of the most complicated eye problems we might get. It would seriously affect our eye sight and looks. Of course, patients with lazy eyes are allowed to use eye patch to assist with sleeping. There is simply no time limit, just try to protect your eyes and get medical treatment to cure your lazy eyes. Hope you recover as soon as possible.
There is no exactly time or a fixed amount of time in that wearing eye patch must according to your condition. Some just need a few months. However, some severe cases need to wear eye patch in a year or more. So the only thing that you can do is to follow your doctor's instructions carefully and follow the schedule to see the eye doctor during treatment.